20481175

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{337}}^1$

素因数の和:388

約数の個数: 48

約数和(自身を含む): 31685472

約数和(自身を除く): 11204297

約数列:

[1, 5, 11, 13, 17, 25, 55, 65, 85, 143, 187, 221, 275, 325, 337, 425, 715, 935, 1105, 1685, 2431, 3575, 3707, 4381, 4675, 5525, 5729, 8425, 12155, 18535, 21905, 28645, 48191, 60775, 63019, 74477, 92675, 109525, 143225, 240955, 315095, 372385, 819247, 1204775, 1575475, 1861925, 4096235, 20481175]

約数ペア:

[(1, 20481175), (5, 4096235), (11, 1861925), (13, 1575475), (17, 1204775), (25, 819247), (55, 372385), (65, 315095), (85, 240955), (143, 143225), (187, 109525), (221, 92675), (275, 74477), (325, 63019), (337, 60775), (425, 48191), (715, 28645), (935, 21905), (1105, 18535), (1685, 12155), (2431, 8425), (3575, 5729), (3707, 5525), (4381, 4675)]